Only the Brave is a based-on-real-events drama about the Granite Mountain Hotshots, an elite crew trained to be the first responders to the very worst sorts of conflagrations. After years of preparation, they finally are called in to battle an epic wildfire threatening a nearby town, although that appears to be merely the climax to the film, which first will chart the efforts of Brolin’s leader to get his team certified to do their heroic work, and the struggle of Teller’s newbie to earn his spot alongside the rest of his experienced mates — no matter the sacrifices required for his own budding family.